Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem é a intérprete original do west end para o personagem Martha?
 ###Tabelas: CREATE TABLE 3rd_liga_promotion_round (3rd_liga_promotion_round_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, 2nd Bundesliga 16th VARCHAR, 3rd Liga 3rd VARCHAR, Game 1 VARCHAR, Game 2 VARCHAR) CREATE TABLE post_season (post_season_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Team VARCHAR, Comp VARCHAR, Long VARCHAR, Rate VARCHAR, RAtt VARCHAR, RYds VARCHAR, RAvg VARCHAR, Lost VARCHAR) CREATE TABLE norwegian_clubs'_performance_in_europe (norwegian_clubs'_performance_in_europe_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Contest and round VARCHAR, Opponent VARCHAR, 1st leg score* VARCHAR, 2nd leg score** VARCHAR, Aggregate score VARCHAR) CREATE TABLE brazil_open (brazil_open_id AUTO_INCREMENT PRIMARY KEY, Year Location VARCHAR, Mens Singles VARCHAR, Womens Singles VARCHAR, Mens Doubles VARCHAR, Womens Doubles VARCHAR) CREATE TABLE characters_casts_and_recordings (characters_casts_and_recordings_id AUTO_INCREMENT PRIMARY KEY, Character VARCHAR, Original Broadway performer VARCHAR, Original Australian performer VARCHAR, Original West End performer VARCHAR, 2005 World AIDS Day Benefit Dream Cast VARCHAR)  
SELECT Original West End performer FROM characters_casts_and_recordings WHERE Character = Martha